@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@700&family=Raleway:wght@900&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Sigmar+One&display=swap');
*, *::before, *::after {
  box-sizing: border-box;
  font-family: Gotham Rounded, sans-serif;
  font-weight: normal;
}

body {
  padding: 0;
  margin: 0;
  background-image: linear-gradient(62deg, #8EC5FC 0%, #E0C3FC 100%);
}
.header h1{
font-family: 'Sigmar One', cursive;
color: white;
text-shadow: 2px 2px 8px rgba(150, 150, 150, 1);
font-size:50px;
}
#menu button{
  height:50px;
  background-color: white;
  border-radius:10px;
  font-size: 15px;
  font-family: 'Open Sans', sans-serif;
}
.calculator-grid {
  display: grid;
  justify-content: center;
  align-content: center;
  min-height: 100vh;
  grid-template-columns: repeat(4, 100px);
  grid-template-rows: minmax(120px, auto) repeat(5, 100px);

}

.calculator-grid > button {
  cursor: pointer;
  font-size: 2rem;
  border: 1px solid white;
  outline: none;
  background-color: rgba(255, 255, 255, .75);
  border-radius:10px;
}

.calculator-grid > button:hover {
  background-color: rgba(255, 255, 255, .9);
}

.span-two {
  grid-column: span 2;
}

.output {
  grid-column: 1 / -1;
  background-color: rgba(0, 0, 0, .75);
  display: flex;
  align-items: flex-end;
  justify-content: space-around;
  flex-direction: column;
  padding: 10px;
  word-wrap: break-word;
  word-break: break-all;
  border-radius:20px;
}

.output .previous-operand {
  color: rgba(255, 255, 255, .75);
  font-size: 1.5rem;
}

.output .current-operand {
  color: white;
  font-size: 2.5rem;
}